/*
 * Copyright (c) 2008-2016 Haulmont.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.haulmont.cuba.core.sys.jpql;

import org.antlr.runtime.ANTLRStringStream;
import org.antlr.runtime.CharStream;

public class AntlrNoCaseStringStream extends ANTLRStringStream {
    public AntlrNoCaseStringStream(String str) {
        super(str);
    }

    @Override
    public int LA(int i) {
        if (i == 0) {
            return 0; // undefined
        }
        if (i < 0) {
            i++; // e.g., translate LA(-1) to use offset 0
        }

        if ((p + i - 1) >= n) {

            return CharStream.EOF;
        }
        return Character.toUpperCase(data[p + i - 1]);
    }
}